In a small bowl, add tuna, cream cheese, garlic powder, salt and pepper. Mix well with a fork.
Toast your bread slices and place them on a baking sheet. Top with tomato slices and divide the tuna mixture on top between the 2 toasts. Helps to shape it into small mounds. Sprinkle with cheese.
Broil tuna melts on High for 2-3 minutes or until cheese has melted.